Kadhom TH, Al-Hashimi WN. A study to compare the efficiency of different instrumentation systems for cleaning oval-shaped root canals (An in vitro study). J Bagh Coll Dent. 2013;25(1):49-55. Accessed May 2, 2025. https://www.jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/138